Recirculating system for gas-fired ovens



Feb. 20, 1945. s. ALTAMORE RECIRCULATING SYSTEM FOR GAS FIRED OVENS Filed Oct. 22, 1945 5 Sheets-Sheet l Feb. 20, 1945.

S. ALTAMORE RECIRCULATING SYSTEM FOR GAS FIRED OVENS 3 Sheets-Sheet 2 Filed 001;. 22, 1945 5554s r/zm/ Alrmme;

a Attorneys Feb. 20, 1945. 5 ALTAMORE 2,369,706

RECIRCULATING SYSTEM FOR GAS FIRED OVENS Filed Oct. 22, 1943 s Sheets-Sheet 3 Inventor SEE/GS 77A7/VL7L TD/VOEZ 4 ttornqys to a suction-blower by heating sisting of a housing Patented Feb. 20, 1945 UNITED 5m Application This invention relates to new and useful improvements in recirculating systems for ovens in which work is heated.

The principal object of the present invention is to provide a special recirculating system for heating ovens wherein the heat is equally distributed across the work. v

Another important object of the invention is to i provide a special recirculating unit for heating ovens which will serve to recirculate heated air in a circular motion across the oven.

Other objects and advantages of the invention will become apparent to the, reader of the following description.

In the drawings:

Figure 1 is a top oven.

Figure 2 is a fragmentary view through the oven.

Figure 3 is an outside elevational view of one of the recirculating units shown in relation to a section of th oven shell.

Figure 4 is an inside elevational view of the unit shown in Figure'3. v I

Figure 5 is an enlarged detailed sectional view taken substantially on the line 5--5 of Figure 3. Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5denotes an oven shell open at its end 6 plan view of the improved vertical longitudinal and provided with a sloping end wall I at its opposite end. At the latter end of the shell 5, the top has a hood 8 from which extends a conduit 9 l driven by an electric motor I l and from the outlet side of which rises a stack l2. Just under the hood8 and within thev shell is a bafileplate l3. 1

Numeral l4 denotes a floor for the shell 5 over which travels the upper flight of an endless conveyor 15, the lower flight of which passes under it will be observed in Figure 2,

belt passes over suitable rollers I the floor l4. and that the conveyor or the like I6. I

Cooling fans I! (motor driven) are located within the end 6 of the oven and this supplies cool air that travels just under the top of the shell 5 and is drawn to the opposite end of the shell 5 by the suction blower l0 acting through the hood 8.

The conveyor l5 carries work through the oven and in the path of circular activities of air set up and recirculating units each of which This par- 3, 4 and 5.

is denoted generally by numeral [8. ticular unit is shown clearly in Figures ES. PATENT OFFICE RECIRCULATING S6YVSTEM FOR GAS -FIRED ENS Sebastian Altamore, Maspeth, N. Y.

October 22,1943, Serial No. 501,347 '2 Claims. (01.263-8) that is, the intake side, an elbow 2i extends and stantially fan-shaped longitudinally in Each unit l8 consists of a suction blower con- IS in which a fan 2i) operates and from the axle portion of this housing 19,

, across the burners connects to the narrow lower portion of a subupwardly tapering conduit 22 which passes through the adjacent side wall of the oven shell 5 and terminates in a narrow elongated mouth 23, bent outwardly to define a is disposed vertically as clearly shown in Figure 5.

Through the lower portion of the same side wall of the shell 5 and for the same unit 18 an elongated mouth 25 is provided and spacially half envelops a gas burner 26 having a plurality of jets 21 and which has a fuel supply pipe 28.. A flared conduit 29 connects the mouth 25 with the exhaust side of the suction blower feature of this unit l8.

It can now be seen, that when the units l8 are functioning, and the burners 26 thereof are in operation, the blowers of these units will force 26, heating the air. The interior of the oven shell 5 has curved baflie plates 36 in the corners thereof to assist in causing a turbulent action of the heated air as it passes in circulation from the mouth 25 through and against the work on the conveyor 5 and then sucked back into the unit by way of the mouth 23 and conduit This air is recirculated time and again, each time being reheated.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the as new is:

1. A recirculating system *for heating ovens comprising an elongated shellhaving an open inlet end, a unit at one side'of the shell, said unit including a suction blower device, a suction mouth located within the shell and being in communi cation withtheintake side of the suction blower device, an outlet mouth located within the lower portion of the oven and being in communication with the exhaust side of the suction blower device, and heating means within the last-mentioned mouth, and a work carrying conveyor movable the oven shell and through which heated air is circulated crosswise of the shell by the unit, and a forced draft air evacuating unit at the other end of said shell and on top thereof.

2. A recirculating system for heating ovens comprising an elongated shell having an open 'nvention, what is claimed 2. 2,869,706" inlet end, a unit at one side of the shell, said unit tioned mouth, and means for circulating cool air including a suction blower device, a suction mouth longitudinally through the oven at the upper porlocated within the shell and being in communition thereof comprising blowers at said open end cation with the intake side of the suction blower of the shell and at the bottom thereof, and a device, an outlet mouth located within the lower forced draft air evacuating unit at the other end portion of the oven and being in communication of the shell on top thereof.

with the exhaust side of the suction blower device, and heating means within the last-men- SEBASTIAN ALTAMORE. 

